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gas/testsuite/ 

2005-01-12  H.J. Lu  <hongjiu.lu@intel.com>

	* i386/i386.exp: Run "sib".

	* gas/i386/sib.d: New file.
	* gas/i386/sib.s: Likewise.

opcodes/

2005-01-12  H.J. Lu  <hongjiu.lu@intel.com>

	* i386-dis.c (OP_E): Ignore scale when index == 0x4 in SIB.
This commit is contained in:
H.J. Lu 2005-01-12 19:12:52 +00:00
parent db5f402d40
commit 2033b4b97d
6 changed files with 41 additions and 1 deletions
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7
gas/testsuite/ChangeLog
View File

@ -1,3 +1,10 @@
2005-01-12 H.J. Lu <hongjiu.lu@intel.com>
* i386/i386.exp: Run "sib".
* gas/i386/sib.d: New file.
* gas/i386/sib.s: Likewise.
2005-01-09 Andreas Schwab <schwab@suse.de>
* gas/i386/intel16.d: Ignore trailing text with #pass.

1
gas/testsuite/gas/i386/i386.exp
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@ -57,6 +57,7 @@ if [expr ([istarget "i*86-*-*"] || [istarget "x86_64-*-*"]) && [gas_32_check]]
run_dump_test "sse2"
run_dump_test "sub"
run_dump_test "prescott"
run_dump_test "sib"
if {![istarget "*-*-aix*"]
&& (![is_elf_format] || [istarget "*-*-linux*"]

15
gas/testsuite/gas/i386/sib.d Normal file
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@ -0,0 +1,15 @@
#objdump: -dw
#name: i386 SIB
.*: +file format .*
Disassembly of section .text:
0+000 <foo>:
0: 8b 04 23 [ ]*mov [ ]*\(%ebx\),%eax
3: 8b 04 63 [ ]*mov [ ]*\(%ebx\),%eax
6: 8b 04 a3 [ ]*mov [ ]*\(%ebx\),%eax
9: 8b 04 e3 [ ]*mov [ ]*\(%ebx\),%eax
c: 90 [ ]*nop [ ]*
d: 90 [ ]*nop [ ]*
...

11
gas/testsuite/gas/i386/sib.s Normal file
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@ -0,0 +1,11 @@
#Test the special case of the index bits, 0x4, in SIB.
.text
foo:
.byte 0x8B, 0x04, 0x23 # effect is: movl (%ebx), %eax
.byte 0x8B, 0x04, 0x63 # effect is: movl (%ebx), %eax
.byte 0x8B, 0x04, 0xA3 # effect is: movl (%ebx), %eax
.byte 0x8B, 0x04, 0xE3 # effect is: movl (%ebx), %eax
nop
nop
.p2align 4,0

4
opcodes/ChangeLog
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@ -1,3 +1,7 @@
2005-01-12 H.J. Lu <hongjiu.lu@intel.com>
* i386-dis.c (OP_E): Ignore scale when index == 0x4 in SIB.
2005-01-10 Andreas Schwab <schwab@suse.de>
* disassemble.c (disassemble_init_for_target) <case

4
opcodes/i386-dis.c
View File

@ -3191,8 +3191,10 @@ OP_E (int bytemode, int sizeflag)
{
havesib = 1;
FETCH_DATA (the_info, codep + 1);
scale = (*codep >> 6) & 3;
index = (*codep >> 3) & 7;
if (index != 0x4)
/* When INDEX == 0x4, scale is ignored. */
scale = (*codep >> 6) & 3;
base = *codep & 7;
USED_REX (REX_EXTY);
USED_REX (REX_EXTZ);